[FL-2627] Flipper applications: SDK, build and debug system (#1387)

* Added support for running applications from SD card (FAPs - Flipper Application Packages)
* Added plugin_dist target for fbt to build FAPs
* All apps of type FlipperAppType.EXTERNAL and FlipperAppType.PLUGIN are built as FAPs by default
* Updated VSCode configuration for new fbt features - re-deploy stock configuration to use them
* Added debugging support for FAPs with fbt debug & VSCode
* Added public firmware API with automated versioning

Co-authored-by: hedger <hedger@users.noreply.github.com>
Co-authored-by: SG <who.just.the.doctor@gmail.com>
Co-authored-by: あく <alleteam@gmail.com>

lib/subghz/receiver.h

@@ -3,6 +3,10 @@
 #include "types.h"
 #include "protocols/base.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 typedef struct SubGhzReceiver SubGhzReceiver;
 
 typedef void (*SubGhzReceiverCallback)(
@@ -63,3 +67,7 @@ void subghz_receiver_set_filter(SubGhzReceiver* instance, SubGhzProtocolFlag fil
  */
 SubGhzProtocolDecoderBase*
     subghz_receiver_search_decoder_base_by_name(SubGhzReceiver* instance, const char* decoder_name);
+
+#ifdef __cplusplus
+}
+#endif